It had two pressurized water reactors. It involved a relatively minor malfunction in the secondary cooling circuit which caused the temperature in the primary coolant to rise. This in turn caused the reactor to shut down automatically. Shut down took about one second. At this point a relief valve failed to close, but instrumentation did not reveal the fact, and so much of the primary coolant drained away that the residual decay heat in the reactor core was not removed. The core suffered severe damage as a result.
Three Mile Island Crisis Case Study
Case Study: Three Mile Island
It is the most significant accident in U. The accident began with failures in the non-nuclear secondary system, followed by a stuck-open pilot-operated relief valve in the primary system. This allowed large amounts of nuclear reactor coolant to escape. The mechanical failures were compounded by the initial failure of plant operators to recognize the situation as a loss-of-coolant accident due to inadequate training and human factors , such as human—computer interaction design oversights relating to ambiguous control room indicators in the power plant's user interface. In particular, a hidden indicator light led to an operator manually overriding the automatic emergency cooling system of the reactor because the operator mistakenly believed that there was too much coolant water present in the reactor and causing the steam pressure release. The accident crystallized anti-nuclear safety concerns among activists and the general public and resulted in new regulations for the nuclear industry.
The Three Mile Obstacle
Linemen have to work in some extreme situations, and deal with fixing something. They have to work with an immense amount of caution because electricity, power, heights, storms, and more are all things that affect their safety. Even though their job is so dangerous, it is needed. Some think they only fix electricity problems, but the truth is that they restore life to places and.